There are several notes for this DTV property. Some are outdated, so take some care of it, making it updated. Signed-off-by: Mauro Carvalho Chehab <mchehab@xxxxxxxxxxxxxxxx> --- .../media/uapi/dvb/fe_property_parameters.rst | 28 +++++++++++++--------- 1 file changed, 17 insertions(+), 11 deletions(-) diff --git a/Documentation/media/uapi/dvb/fe_property_parameters.rst b/Documentation/media/uapi/dvb/fe_property_parameters.rst index 1b0b1171602d..f776d62523da 100644 --- a/Documentation/media/uapi/dvb/fe_property_parameters.rst +++ b/Documentation/media/uapi/dvb/fe_property_parameters.rst @@ -219,23 +219,29 @@ Bandwidth for the channel, in HZ. Possible values: ``1712000``, ``5000000``, ``6000000``, ``7000000``, ``8000000``, ``10000000``. -Notes: +.. note:: -1) For ISDB-T it should be always 6000000Hz (6MHz) + #. DVB-T supports 6, 7 and 8MHz. -2) For ISDB-Tsb it can vary depending on the number of connected -segments + #. DVB-T2 supports 1.172, 5, 6, 7, 8 and 10MHz. -3) Bandwidth doesn't apply for DVB-C transmissions, as the bandwidth for -DVB-C depends on the symbol rate + #. ISDB-T supports 5MHz, 6MHz, 7MHz and 8MHz, although most + places use 6MHz. -4) Bandwidth in ISDB-T is fixed (6MHz) or can be easily derived from -other parameters (DTV_ISDBT_SB_SEGMENT_IDX, -DTV_ISDBT_SB_SEGMENT_COUNT). + #. On DVB-C and DVB-S/S2, the bandwidth depends on the symbol rate. + So, the Kernel will silently ignore setting :ref:`DTV-BANDWIDTH-HZ`. -5) DVB-T supports 6, 7 and 8MHz. + #. For DVB-C and DVB-S/S2, the Kernel will return an estimation of the + bandwidth, calculated from :ref:`DTV-SYMBOL-RATE` and from + the rolloff, with is fixed for DVB-C and DVB-S. -6) In addition, DVB-T2 supports 1.172, 5 and 10MHz. + #. For DVB-S2, the bandwidth estimation will use :ref:`DTV-ROLLOFF`. + + #. For ISDB-Tsb, it can vary depending on the number of connected + segments. + + #. Bandwidth in ISDB-Tsb can be easily derived from other parameters + (DTV_ISDBT_SB_SEGMENT_IDX, DTV_ISDBT_SB_SEGMENT_COUNT). .. _DTV-INVERSION: -- 2.7.4 -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
